Originated from mass selection of the Cluster hop, which is an old American cultivar. It is suggested that they arose from hybridization of varieties, imported by Dutch and English settlers and indigenous male hops. Also known as Golden Cluster, used as the sole bittering hop in the iconic Queensland, Australia beer XXXX Gold and XXXX Bitter. Can give a black currant aroma/flavor
Cluster is classic American hop developed for US large breweries. It is a low to medium acid (5 to 8.5% AAU) hop that imparts a clean, neutral, somewhat floral bitterness. At higher alpha levels, Cluster is appropriate for use in bittering and, at all levels, is good for aroma and finish. Cluster can be used in a wide range of beers.
Alpha Acids: Medium Alpha
Hop Aroma: Floral and Spicy
Hop Usage: Bittering and Aroma
General Trade Perception: An excellent general purpose hop with medium and well-balanced bittering potential and no undesirable aroma properties.
Possible Substitutions: Galena, possibly US Northern Brewer
Typical Beer Styles: Ale (Aroma), Lager (Bittering), Stout
Additional Information: For years the standard US cultivar, improved mass selection in the mid-sixties. Limited acreage grown today.
Pedigree: Not known but possibly a result of a cross between an English variety and an American male hop.
Maturity: Early to late
Yield: 1900 – 2400 kg. /ha. or 1700 – 2140 lb. /ac.
Growth Habit: Vigorous but manageable
Disease/Pest Susceptibility: Very susceptible to downy mildew. Not seriously affected by Prunus necrotic ring-spot virus.
Cone-Structure: Medium-compact cone
Lupulin: Plentiful, yellow in color
Aroma: Floral and spicy
Alpha Acids: 5.5 – 8.5% w/w
Beta Acids: 4.5 – 5.5 %w/w
Co-Humulone: 36 – 42% of alpha acids
Storageability: 80 – 85% alpha acids remaining after 6 months storage at 20º C
Total Oil: 0.4 – 0.8 mls/100 grams
Myrcene: 45 – 55% of whole oil
Humulene: 15 – 18% of whole oil
Caryophyllene: 6 – 7% of whole oil
Farnesene: <1% of whole oil